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When the Enable On property is set for conditional execution the operator will include a digital input pin that dictates when the underlying sub-schema file is to execute. If set to Rising Edge, the sub-schema will execute at the instant that the digital input switches from LOW to HIGH. If set to Falling Edge, the sub-schema will execute at the instant that the digital input switches from HIGH to LOW. If set to Active High or Active Low, the sub-schema will execute whenever the input is HIGH or LOW, respectively.